Finding the Fourth Proportional to 139,875.94, 209,815.40 and 111,973.40

Step by Step Solution

1. Step 1: Write the proportion equation
   139,875.94 : 209,815.40 = 111,973.40 : x
2. Step 2: Convert to fraction form
   139,875.94/209,815.40 = 111,973.40/x
3. Step 3: Cross multiply
   139,875.94x = 209,815.40 × 111,973.40
4. Step 4: Simplify right side
   139,875.94x = 23,493,742,101.42
5. Step 5: Solve for x
   x = 23,493,742,101.42/139,875.94
6. Step 6: Final answer
   x = 167,961.28